| Month | AQI | Health quality |
| Feb. | 408 | Hazardous |
| March | 496 | Hazardous |
| April | 260 | Very unhealthy |
| May | 181 | Unhealthy |
| June | 193 | Unhealthy |
| July | 157 | Unhealthy |
| September | 80 | Moderate |
| October | 78 | Moderate |
| November | 56 | Moderate |
| December | 63 | Moderate |
| Jan. 2013 | 79 | Moderate |